aLegendWai: How about if plays at a? Will it live?
If both can make w live, which is better and why?
Thanks for the answer.
unkx80: The following two diagrams should show the difference.
Answering this hane at 1-2 leads to disaster. Black can't play 8 at a because of shortage of liberties. If Black 6 at a, White 7 at 6 kills: see rectangular six in the corner.
I may be missing the bleeding obvious here - but doesn't Black 6 at 7 give life for black?
RichardHunter: A Japanese book I have says this also lives but is thin. The reason is at both b and c are sente, which is not the case if Black plays the 2-2 point as above.
Bill: I set up a difference game, but the advantage of the 2-2 is not so clear to me.
For instance, threatens to kill, but
protects the group. Now Black would have an advantage if he could play
with sente, but White plays
, probably leading to mutual damage.
Good question. If here, White makes a bulky five inside Black's eyespace. Black can not play at a because of shortage of liberties. What I said is wrong !! --Dieter
Dieter -- black will not play at a, but capture -- white 4 is a snapback. I still see this as black lives. Dieter: Yes I noticed, but didn't have the time to re-edit my stuff. Hence the exclamation above.
Bill: How about B 6? Dieter: see above (though you were first). Maybe a white stone at b is appropriate to prevent escape. WRONG. Needs edit Dieter